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Problem
Problem
The function
f
(
x
)
=
2
∣
x
∣
+
∣
x
+
2
∣
−
∣
∣
x
+
2
∣
−
2
∣
x
∣
∣
f(x) = 2|x| + |x+2| - ||x+2| - 2|x||
f
(
x
)
=
2∣
x
∣
+
∣
x
+
2∣
−
∣∣
x
+
2∣
−
2∣
x
∣∣
has a local minimum or a local maximum at
x
x
x
is equal to a.
−
2
-2
−
2
b.
−
2
3
-\frac{2}{3}
−
3
2
c.
2
2
2
d.
2
/
3
2/3
2/3
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